158 lines
3.5 KiB
Markdown
158 lines
3.5 KiB
Markdown
---
|
|
title: Electrical Takeoff
|
|
tags:
|
|
- occupational/takeoff
|
|
- status/draft
|
|
- type/guide
|
|
up: "[[takeoff-scripts]]"
|
|
aliases:
|
|
- electrical takeoff
|
|
---
|
|
# Electrical Takeoff
|
|
|
|
> [!important]
|
|
> Complete [[pre-takeoff-research]],
|
|
> including [[conest-wiring-method-selection]] and [[conest-wiring-device-research]],
|
|
> before beginning takeoff.
|
|
|
|
> [!tip]
|
|
> Use [[heating-designations]] for uncertain scope.
|
|
|
|
## Garage
|
|
|
|
In conventional slab garages,
|
|
use ENT and PVC as permitted.
|
|
|
|
In precast slab garages, use EMT.
|
|
|
|
## Receptacles
|
|
|
|
> [!important]
|
|
> Receptacle symbols are not standard.
|
|
> Always check the electrical legend.
|
|
|
|
## Floor Boxes
|
|
|
|
`COMMON ASSEMBLIES`/`FLOOR BOXES`/...
|
|
|
|
### Poke-Thru's
|
|
|
|
Use suitable floor box assembly,
|
|
delete floor box items,
|
|
add `ITEM DATABASE`/`WIRING & SYSTEM DEVICES`/`FLOOR BOXES & FITTTINGS`/`GENERIC - FLOOR BOXES & ACCESS`/`POKE-THRU W/ DUPLEX RECEPTACLE`
|
|
|
|
## Homeruns
|
|
|
|
### Lighting Homeruns
|
|
|
|
> [!info] Breakdowns
|
|
> * `Area` = "XX - Level XX Building"
|
|
> * `Phase` = "Building - Back of House (BOH)"
|
|
|
|
Takeoff homeruns in Building breakdowns,
|
|
even where serving Amenity spaces.
|
|
|
|
## Mechanical Connections
|
|
|
|
### General
|
|
|
|
`COMMON ASSEMBLIES`/`MECHANICAL CONNECTIONS ...`/...
|
|
|
|
When using length-based assemblies use adders per [[feeders-takeoff]].
|
|
|
|
%% TODO
|
|
#### PVC Connection Assemblies
|
|
|
|
#### Flex
|
|
|
|
[[conest-wiring-method-selection#Liquidtight Flex]]
|
|
|
|
%%
|
|
|
|
### Stair Pressurization Fans
|
|
|
|
Assume branch circuit conductors must be protected
|
|
per [[fire-resistive-wiring-methods-takeoff]].
|
|
|
|
### Roof Mounted Equipment
|
|
|
|
#### Unit Condensing Units
|
|
|
|
##### Homeruns
|
|
|
|
> [!info] Breakdowns
|
|
> * `Area` = _Match unit_
|
|
|
|
.../`CONDENSOR HOME RUNS`
|
|
|
|
* **Horizontal:** Distance from load center to FCU.
|
|
(~50ft expected)[^1]
|
|
|
|
* **Vertical:** floor-to-floor distance from FCU to CU
|
|
|
|
[^1]: [[2026-05-04_14-57-49#Unit Condensing Units]]
|
|
|
|
| Level | Horizontal | Vertical | Length |
|
|
| :------- | ---------: | -------: | -----: |
|
|
| Level 01 | 150 | 40 | 190 |
|
|
| Level 02 | 150 | 30 | 180 |
|
|
| Level 03 | 150 | 20 | 170 |
|
|
| Level 04 | 150 | 10 | 160 |
|
|
|
|
##### Connections
|
|
|
|
> [!info] Breakdowns
|
|
> * `Area` = _Match CU (usually roof)_
|
|
|
|
.../`CU CONDENSER SLEEVE W/ FLEX - NO HMRN WIRE`
|
|
|
|
`NO SLEEVE`:
|
|
Routed through a "doghouse"
|
|
(a large weatherproof opening)
|
|
with several other feeds.
|
|
Used where drilling openings for individual sleeves
|
|
would be impractical.
|
|
|
|
`PVC SLEEVE`, `EMT SLEEVE`:
|
|
Routed up through the roof,
|
|
(optionally through a disconnect)
|
|
with flex to the equipment.
|
|
|
|
#### Equipment Racks
|
|
|
|
Max 20 disconnects per rack
|
|
|
|
`DISTRIBUTION`/`TRAPEZE RACK SUPPORT ...`/...
|
|
|
|
## Trash Chute
|
|
|
|
1. **Horizontal:**
|
|
|
|
`COMMON ASSEMBLIES`/`MECHANICAL CONNECTIONS ...`/...
|
|
* **Length** = Length per drawings, 100ft if not shown.
|
|
|
|
2. **Vertical (Riser):**
|
|
|
|
* `Area` = "Typical - Building All Levels"
|
|
|
|
Takeoff: `COMMON ASSEMBLIES`/`MISC ASSEMBLIES`/`TRASH CHUTE RISER CIRCUIT...`
|
|
* **Length** = average floor to floor height
|
|
|
|
## Fire/Smoke Dampers
|
|
|
|
[[fire-alarm-takeoff#Fire/Smoke Dampers (FSD's)]]
|
|
|
|
## Clubline Raceway
|
|
|
|
[Raceway Systems - CRG](https://crg.us.com/products/raceway-systems/)
|
|
|
|
Clubline Raceway, also called CRG Raceway,
|
|
is a glorified cable management trough.
|
|
It is not a [[nfpa-70_376|wireway]],
|
|
so conductors must be run in a [[nfpa-70_national-electric-code#Chapter 3 Wiring Methods and Materials|Chapter 3]] wiring method.
|
|
|
|
Count receptacles normally,
|
|
using ==surface-mount EMT assemblies==.
|
|
|
|
Create a temporary item for the raceway itself.
|